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Analog Devices Inc./Maxim Integrated MAX1724EZK50+T
- Part No.:
- MAX1724EZK50+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1724EZK50+T.pdf
- Description:
- IC REG BOOST 5V 400MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,183
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Product details
Overview
MAX1724EZK50+T from Maxim Integrated is a fixed-output 5.0V, high-efficiency step-up DC-DC converter in a 5-pin TSOT package, featuring 1.5μA quiescent current, 0.91V guaranteed startup voltage, ±1% output voltage accuracy, and integrated synchronous rectification. It is designed for single-cell battery-powered devices requiring ultra-low power consumption and minimal board space, such as remote wireless transmitters and personal medical devices.
For engineers reviewing the MAX1724EZK50+T datasheet, MAX1724EZK50+T pinout, MAX1724EZK50+T application, or MAX1724EZK50+T equivalent, key selection criteria include fixed 5.0V output, 0.8V–5.5V input range, active-low shutdown with 0.01μA shutdown current, internal EMI suppression, and TSOT package compatibility with space-constrained portable designs.
Technical Context
The MAX1724EZK50+T employs a forced discontinuous, current-limited pulse-frequency-modulation (PFM) control scheme with no external oscillator, enabling ultra-low quiescent current and high light-load efficiency. Its internal N-channel power switch (0.5Ω RDS(ON)) and P-channel synchronous rectifier eliminate the need for an external Schottky diode.
A dedicated damping switch on the BATT pin suppresses inductor ringing and reduces EMI without impacting output ripple. Startup is guaranteed down to 0.91V at +25°C with resistive load, powered directly from the BATT pin - a feature distinguishing it from the MAX1723 and enabling reliable operation from deeply discharged alkaline/NiMH cells.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% over -40°C to +85°C - ensures stable rail for 5V logic or analog circuitry without external feedback components. |
| Input Voltage Range | 0.8V to 5.5V - supports operation from one alkaline/NiMH cell (down to near-dead state) or single Li+ cell. |
| Quiescent Current | 1.5μA into OUT - maximizes battery life in always-on, low-duty-cycle applications like remote sensors. |
| Shutdown Current | 0.01μA at +25°C - enables true zero-power standby when SHDN is pulled low. |
| Startup Voltage | 0.91V minimum at +25°C - guarantees reliable turn-on even with weak or aging primary cells. |
| Max Output Current | Up to 150mA at VIN = 1.5V, VOUT = 5.0V - sufficient for driving RF modules, small displays, or microcontroller peripherals. |
| Efficiency | Up to 90% at mid-load - achieved via synchronous rectification and optimized PFM control, reducing thermal stress and extending runtime. |
Pinout & Package
MAX1724EZK50+T is housed in a 5-pin Thin SOT (TSOT) package (0.9mm typical height, 2.0mm × 2.1mm footprint), optimized for ultra-compact portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT | Battery input and damping switch connection | Primary power input path; integrates damping switch to suppress LX ringing and reduce EMI without external components. |
| SHDN | Active-low shutdown control input | Logic-level input (VIL ≤ 75mV, VIH ≥ 500mV); pulls device into sub-0.01μA shutdown mode when grounded. |
| GND | Analog and power ground reference | Common return path for all internal circuits; must be connected to low-impedance ground plane for noise immunity. |
| OUT | Regulated power output and bootstrap supply | Delivers fixed 5.0V output; also powers internal gate drivers - requires local 10μF ceramic decoupling. |
| LX | Switch node connecting internal N-FET drain and P-FET drain | High-frequency switching node; connects to external 10μH inductor - trace must be short and wide to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces BOM count, board area, and conduction losses by replacing ~0.3V diode drop with <0.2V MOSFET RDS(ON) loss. |
| Integrated damping switch | Actively clamps LX ringing during discontinuous conduction - cuts radiated EMI by >10dB without degrading efficiency or output ripple. |
| Ultra-low quiescent current | 1.5μA supply current enables >1-year battery life in 10μA average-load applications using two AA alkaline cells. |
| Guaranteed low-voltage startup | 0.91V startup threshold allows operation from batteries depleted below 1.0V - critical for long-life disposable medical or sensor devices. |
| Fixed 5.0V output | No external feedback resistors required - simplifies layout, improves production yield, and eliminates resistor tolerance drift from output regulation. |
Applications
| Remote Wireless Transmitters | Personal Medical Devices |
|---|---|
Use Scenario: Battery-powered BLE/Wi-Fi/ISM-band transmitters operating intermittently in wearable or implantable form factors. IC Role / Device Role / Timing Role: Step-up regulator generating stable 5.0V rail for RF power amplifier and MCU core logic from a single 1.5V alkaline cell. Use Value: 1.5μA quiescent current extends shelf life and operational lifetime; 0.91V startup ensures reliable transmission even after months of storage or deep discharge. |
Use Scenario: Portable glucose meters, pulse oximeters, or ECG patches powered by coin-cell or AAA batteries. IC Role / Device Role / Timing Role: Primary voltage booster supplying regulated 5.0V to analog front-end (AFE), display driver, and Bluetooth SoC from 1.2–1.5V input. Use Value: Fixed 5.0V output eliminates calibration drift from resistor tolerances; TSOT package fits within <100mm² PCB area constraints typical of handheld diagnostics. |
| Digital Still Cameras (Compact) | Low-Power Hand-Held Instruments |
Use Scenario: Miniature digital cameras using single-cell alkaline/NiMH batteries for flash LED drive and image sensor biasing. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering 5.0V at up to 150mA peak to white LED flash array and CMOS image sensor interface. Use Value: Up to 90% efficiency minimizes heat generation near optics; internal EMI suppression prevents noise coupling into analog image capture path. |
Use Scenario: Portable multimeters, gas detectors, or environmental monitors requiring long field deployment on primary batteries. IC Role / Device Role / Timing Role: Main power supply converting 1.5V battery voltage to clean 5.0V for precision ADC, LCD controller, and wireless telemetry ICs. Use Value: Shutdown current of 0.01μA enables multi-year standby; ±1% output accuracy maintains measurement integrity across temperature and battery aging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1724ELT50+T | Same electrical specs and functionality, but in 6-pin µDFN (2mm × 2mm × 0.75mm) package - larger footprint, lower profile, different pinout (LX and N.C. swapped). | Preferred where thermal dissipation or board-side component stacking is prioritized over minimal X-Y area. | Select MAX1724ELT50+T only if µDFN land pattern and assembly capability are available; not pin-compatible with MAX1724EZK50+T. |
| TPS61200DRCT | Fixed 5.0V output, 1.8μA quiescent current, 0.3V startup, no integrated damping switch; uses external diode in some configurations. | Better suited for higher-input-voltage scenarios (>1.8V) where EMI suppression is less critical and cost-per-watt is prioritized. | Choose TPS61200DRCT only when board layout allows external diode placement and EMI filtering; lacks MAX1724EZK50+T's 0.91V startup guarantee and damping switch. |
Compared with MAX1724ELT50+T, the MAX1724EZK50+T offers superior board-area efficiency in ultra-thin designs; compared with TPS61200DRCT, it delivers significantly lower startup voltage and built-in EMI mitigation - making it the preferred choice for single-cell primary battery systems demanding maximum runtime and regulatory compliance.
Availability
MAX1724EZK50+T is available at Aetrix Electronics and suitable for remote wireless transmitters, personal medical devices, and low-power hand-held instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1724EZK50+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and portable applications.
The MAX1722/MAX1723/MAX1724 family was designed specifically for ultra-low-power, space-constrained battery-powered systems - emphasizing sub-2μA quiescent current, sub-1V startup, and integrated EMI reduction without external components.
FAQ
What is the guaranteed minimum startup voltage for MAX1724EZK50+T?
The MAX1724EZK50+T guarantees startup at 0.91V (minimum) at +25°C with resistive load, as confirmed in the Electrical Characteristics table. This is enabled by its dedicated BATT-pin-powered startup circuit - a key differentiator from the MAX1723, which requires an external Schottky diode for sub-1.2V startup. The MAX1724EZK50+T maintains this capability across its full -40°C to +85°C operating range, with typical startup voltage rising to ~0.95V at -40°C.
Does MAX1724EZK50+T require external feedback resistors to set the output voltage?
No, the MAX1724EZK50+T does not require external feedback resistors. It is a fixed-output variant delivering 5.0V ±1% over temperature and line, as specified in the Selector Guide and Electrical Characteristics tables. Unlike the adjustable MAX1722/MAX1723, the MAX1724EZK50+T integrates internal feedback - eliminating resistor matching errors, board space, and long-term drift concerns associated with external dividers.
What package type and pin count does MAX1724EZK50+T use?
The MAX1724EZK50+T uses a 5-pin Thin SOT (TSOT) package, with outline number 21-0113 and land pattern 90-0241. Pin configuration is BATT (1), SHDN (2), GND (3), FB (4), OUT (5), and LX (not present - unlike µDFN variants). This compact 2.0mm × 2.1mm × 0.9mm package is optimized for high-density portable PCBs and is distinct from the 6-pin µDFN version (MAX1724ELT50+T).
How does the damping switch in MAX1724EZK50+T reduce EMI?
The damping switch in the MAX1724EZK50+T is connected internally to the BATT pin and activates during the off-time of the LX node to dissipate resonant energy from the inductor-capacitor tank. As shown in Figures 5 and 6 of the datasheet, this suppresses high-frequency ringing at LX by >10dB without affecting output ripple or efficiency - directly addressing EMI compliance challenges in compact battery-powered devices without requiring additional ferrite beads or RC snubbers.
What is the shutdown current specification for MAX1724EZK50+T?
The MAX1724EZK50+T specifies a shutdown current of 0.01μA (maximum) at +25°C and 0.01μA (maximum) at +85°C, measured into the BATT pin per Note 4 in the Electrical Characteristics table. This ultra-low shutdown current enables true zero-power standby in applications like emergency beacons or tamper-detection sensors, where years of shelf life and instantaneous wake-up are required - outperforming many competing boost converters by an order of magnitude.
MAX1724EZK50+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 400mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MAX1724EZK50+T FAQ
1.How can I place an order for MAX1724EZK50+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1724EZK50+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX1724EZK50+T reliable?
The price and inventory of MAX1724EZK50+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1724EZK50+T is usually 5 days.
3.What payment methods are accepted for MAX1724EZK50+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1724EZK50+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1724EZK50+T?
MAX1724EZK50+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1724EZK50+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX1724EZK50+T?
For technical support, including MAX1724EZK50+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1724EZK50+T requirements.
6.How does Aetrix verify that MAX1724EZK50+T is sourced from the original manufacturer or authorized distributors?
All MAX1724EZK50+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX1724EZK50+T meets industry standards.
7.What is the process for return or replacement of MAX1724EZK50+T?
All MAX1724EZK50+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1724EZK50+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX1724EZK50+T part is unused and in its original packaging.
Return procedure for MAX1724EZK50+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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